I have a problem to add a jar to the java build path.
The manifest class path in the jar have an entry ". .. another.jar".
When I add this jar, eclise 3.5.2(Build id: 20100218-1602) throws Exception:

java.lang.reflect.InvocationTargetException
at org.eclipse.jface.operation.ModalContext.runInCurrentThread(ModalContext.java:477)
at org.eclipse.jface.operation.ModalContext.run(ModalContext.java:372)
at org.eclipse.jface.dialogs.ProgressMonitorDialog.run(ProgressMonitorDialog.java:507)
at org.eclipse.ui.internal.progress.ProgressMonitorJobsDialog.run(ProgressMonitorJobsDialog.java:275)
at org.eclipse.ui.internal.progress.ProgressManager.run(ProgressManager.java:1178)
at org.eclipse.jdt.internal.ui.wizards.buildpaths.newsourcepage.AddSelectedLibraryToBuildpathAction.run(AddSelectedLibraryToBuildpathAction.java:113)
at org.eclipse.jface.action.Action.runWithEvent(Action.java:498)
at org.eclipse.jface.action.ActionContributionItem.handleWidgetSelection(ActionContributionItem.java:584)
at org.eclipse.jface.action.ActionContributionItem.access$2(ActionContributionItem.java:501)
at org.eclipse.jface.action.ActionContributionItem$5.handleEvent(ActionContributionItem.java:411)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1003)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3910)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3503)
at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2405)
at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2369)
at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2221)
at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:500)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:493)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:113)
at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:194)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:110)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:79)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:368)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:179)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:559)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:514)
at org.eclipse.equinox.launcher.Main.run(Main.java:1311)
at org.eclipse.equinox.launcher.Main.main(Main.java:1287)
Caused by: java.lang.NullPointerException
at org.eclipse.core.runtime.Path.<init>(Path.java:183)
at org.eclipse.core.internal.resources.WorkspaceRoot.getProject(WorkspaceRoot.java:179)
at org.eclipse.jdt.internal.core.ExternalFoldersManager.isExternalFolderPath(ExternalFoldersManager.java:77)
at org.eclipse.jdt.internal.core.JavaProject.addToResult(JavaProject.java:2651)
at org.eclipse.jdt.internal.core.JavaProject.resolveClasspath(JavaProject.java:2628)
at org.eclipse.jdt.internal.core.JavaProject.resolveClasspath(JavaProject.java:2679)
at org.eclipse.jdt.internal.core.JavaProject.getResolvedClasspath(JavaProject.java:1866)
at org.eclipse.jdt.internal.core.ProjectReferenceChange.updateProjectReferencesIfNecessary(ProjectReferenceChange.java:46)
at org.eclipse.jdt.internal.core.ChangeClasspathOperation.classpathChanged(ChangeClasspathOperation.java:59)
at org.eclipse.jdt.internal.core.SetClasspathOperation.executeOperation(SetClasspathOperation.java:62)
at org.eclipse.jdt.internal.core.JavaModelOperation.run(JavaModelOperation.java:728)
at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:1800)
at org.eclipse.jdt.internal.core.JavaModelOperation.runOperation(JavaModelOperation.java:793)
at org.eclipse.jdt.internal.core.JavaProject.setRawClasspath(JavaProject.java:2890)
at org.eclipse.jdt.internal.core.JavaProject.setRawClasspath(JavaProject.java:2906)
at org.eclipse.jdt.internal.corext.buildpath.ClasspathModifier.commitClassPath(ClasspathModifier.java:1044)
at org.eclipse.jdt.internal.ui.wizards.buildpaths.newsourcepage.AddSelectedLibraryToBuildpathAction.addLibraryEntries(AddSelectedLibraryToBuildpathAction.java:136)
at org.eclipse.jdt.internal.ui.wizards.buildpaths.newsourcepage.AddSelectedLibraryToBuildpathAction.access$0(AddSelectedLibraryToBuildpathAction.java:124)
at org.eclipse.jdt.internal.ui.wizards.buildpaths.newsourcepage.AddSelectedLibraryToBuildpathAction$1.run(AddSelectedLibraryToBuildpathAction.java:106)
at org.eclipse.jface.operation.ModalContext.runInCurrentThread(ModalContext.java:464)
... 34 more